Re: Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
walter.bender at gmail.com
Wed Jul 20 23:28:57 EDT 2011
On 7/20/11, forster at ozonline.com.au <forster at ozonline.com.au> wrote:
>> I have a partially complete refactoring of the camera code that should
>> speed things up; in the meantime, I wonder if a simple resistive light
>> sensor run through the mic input wouldn't do just as well.
> A cadmium sulphide photoresistor (ORP12 equivalent) worked OK measuring
> resistance in Turtle art
> Cover cell with little finger and hold near bright light. Pulse gives +-50
> ohms in 3000 ohms.
> Screenshot attached
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